Biggest impact: moving from integrated to separates


I am slowly moving to separates from my Cronus Magnum integrated amp. So far, I’ve upgraded the Phono stage to a Pass Labs XP-15. I’m now looking for the next upgrade. I will need an amp and a line stage preamp. My budget is @ $3K and I am looking for the biggest bang for the buck. Which upgrade should come next? I would like anything I upgrade to have balanced connections (for linestage both ins and outs.)

thanks
asp307
@twoleftears and that is important to consider, the law of diminishing returns. I am not going to obsess over a perceived 5% gain in benefits for 3 or 4 times the spend of the CM1. But if there is something out there that I should consider that will make a large impact, at my budget, than I would like to explore.
@asp307 I too was once an integrated only guy. I felt the synergy of a 1 box solution and the ability to avoid complications with an extra interconnect outweighed the benefits of seperates. I was completely wrong.... : ) you will never look back from seperates, it's just more expensive. Now how best do we spend your 3k..... Your current integrated, are you able to run it as an amp only with an external preamp?

@robd2 thanks, I am not looking to upgrade both amp and line stage at this point, just one or the other with the next upgrade probably occurring next year. I can continue using the Cronus Magnum either as a line stage or amp so I have flexibility. 

I am choosing to build around the Pass Labs XP15 phono preamp as I am very pleased with it. 

I'll list my current set-up below for future reference. In terms of what I am trying to achieve, I guess you can say more of everything that I love about my current set-up. Lower noise floor, wider sound stage, strong detailed bass, etc. My speakers excel in the mid-range area so further attention to this area may be moot but again open to suggestions. 

VPI Scout 1.1 TT
Lyra Delos MC
Pass Labs XP-15 phono pre
Rogue Audio Cronus Magnum (version 1 with KT120 tubes)
ZU Audio Soul MKII (99 db)
ZU Audio Mission MKII phono, interconnect and speaker cables
ZU Audio Event MKI power cables

thanks 
This looks to be an easy decision to me. I would look for a dedicated line stage as your next step. Do you want new or is used ok? Remember you will need 
@robd2h , thanks. I am fine with used or new. Perks of new would be a forgiving return policy in most cases. Perks of used would be buying up a few levels at my budgeted price.